Method and machine for making roofing elements



Aug 1?, 1926, 1,596,449

C. E. RAHR METHOD AND MACH INE FOR MAKING ROOFING ELEMENTS Filed Augnst26, 1924 2 Sheets-Sheet 1 Aug. 17 1926. 1,596,449

C. E. RAHR METHOD AND MACHINE FOR MAKING ROOFING ELEMENTS Filed Au ust26, 1924 2 Sneets-Sheet 2 lawman/$02 Ufuesifiivf fair l taln'ng anyspecial steps to this end.

Patented Aug. 17, 1926.

UNITED STATES PATENT OFFICE. C.Q

aims-ms. E.

- comramr,

BAHB, OF BROOKLINE, MASSACHUSETTS, ASSIGNOR TO THE FLINT'KOTE OF BOSTON,MASSACHUSETTS, A CORPORATION 'OF MASSACHUSETTS.

mrron AND, moms For. MAKING. noorma ELEMENTS.

Application and august 26, 1924. serial m. 784,154.

Prepared roofing is now commonly made 'by forming a continuous web offibrous material, such as rag felt, on a paper machine and saturatingand coating the web or sheet with asphalt or similar waterproofingmaterial. A surfacing of granular material such as crushed slate isoften partially embedded in the coating to provide a fireproof surfaceof pleasing color, and which also acts to protect the asphalt fromexposure to the weather. After the sheet, material is thus prepared itis cut into roofing elements to pack for shipment.

One of the forms in which such material is cut is the so called stripshingle, which comprises a strip having shingle-simulating tabs alongone edge defined by narrow slots or cutouts between them. The stock cutout when the slots are formed thus comprises saturated, coated, andsurfaced material which is unreclaimable waste. p

sides the loss of paper stock, asphalt and surfacing material.represented by these cutouts there is also the expense of carting offfrom the mill and disposing of this rapidly accumulating waste where itwill not be objectionable.

According to the present invention the production of this unreclaimablewaste is 80 entirely avoided byforming the web of fibrous material withthe. slots thereln as by so forming the cylinder molds that pulp is notdeposited thereon over areas corre sponding in position and arrangementto. the slots in theweb before it is cut into strip shingles. Thesaturant, coating, and facing materials thus fail to be deposlted overthese areas without the necessity of 40 For a more completeunderstanding of this invention reference may be had to the accompanyingdrawings, in which Figure 1 is a somewhat diagrammatlc side elevation ofa multi-cylinder paper machine designedto function according to thisinvention.

Figure 2 is a fragmentary elevation of acylindermold therefor. Figure 3is a cross section on line .3-3 of Figure -2.

Figure 4 a fragmentary perspective of a web of sheet material as itcomes from the machine.

Figure 5 is a view similar to Figure 4,

but showinga modification.-

Figures 6, 7 and 8 illustrate various other arrangements and shapes ofopenings which may be formed by the use of correspondingly shapedunreticulated portions correspondingly positioned on the cylinder mold.

Figures 9,10 and 11 illustrate forms of roofing to be made. from thesheet material formed up according to Figures 6, 7 and 8 respectively. M

Referring to Figure 1, -1 indicates the vat 'of' a paper machine inwhich is partially submerged the cylinder molds 2 in the usual manner.Over the tops of these cylinder molds passes the blanket 3, thisblanketpicking off from the cylinder molds the pulp deposited thereonand forming a multily sheet in a manner well understood in the art. Theblanket as shown passes beneath rollers 5 above each cylinder mold and yshown) and the blanket returns in an endless path to again cooperatewith the cylinder molds in series in a continuous operation. The lindermolds are commonly formed of reticulated material so'that the water maypass from outside into these molds and drain off therefrom, leaving thepulpdeposited on the reticulated surfaces. In order that it may fail tobe deposited over the complete areas of the sheet so as to ,define thecutouts between the shingle simulating tabs, rectangular unreticulated"1 portions corresponding to the areas on which it, is not desired todeposit the pulp are formed or fixedto the outer surface of eachcylinder mold, this being shown in Figures 2 and 3 at 10, thereticulatedsurface being indicated at 11. a

As shown the portions, 10 project somewhat from the periphery ofeach'cylinder mold soas to define sharply the edges of the cutouts, thefibrous material being deposited on the mold over the reticulatedportions 11 and failingto be deposited the sub'g s n areas emanate):thei'n rt ons 10. As shown these: portions 10' are ar- ,complished bydriving.

ranged spaced apart in parallel series corresponding lengthwise of theroll to 'the widths of the-shingle simulating tabs to be formed in thefinal product, and corresponding circumferentially of the roll to thedistance between the tabs where the material is to be cut from thecontinuous sheet by longitudinal and cross cuts to form strip shinglesas shown in Figure 4c. At the ends of the cylinder mold imperforateelements 20. each of one-half the width of the imperfw rate elements 10,but otherwise similar theremay be employed to properly forn'rthe sidesof the sheet material to'define notches 22 the slots 12 formed by theelements 10 and in transverse alinement therewith. It is of courseimportant to rotate the cylinder moldsin synchronism so as to cause theslot and notch formations from the successive molds to accuratelyregister on the blanket. This, however, may be readily acthe cylindermolds by a common drive shaft 15 by bevel gear connections 16 to eachcylinder mold. The

shaft.15 is shown as supported-in bearings 17 positioned along one side.of the vat. The sheet thus formed slots and edge notches is thensaturated and otherwise finished, the, slots and the notches remainingopen and substantially unobstructed throughout the further; processesoftreating the web. The material having received its final treatment isthen cut up' into units, which may be done by slitting the sheet lenthwise to" define the endsof the strip units, the slit passing centrallythrough one row of slots, as shown along the line aa in Figure 4:, andbeing chopped 'ofi laterally of the sheet through the slots and betweenthe slots as shown on the lines 6-5 and co, respectively. With thismanner of cuttin it is evident that the adjacent shingles ace oppositelylengthwise of the Csheet, fthe:i line 0-0 defilnin the uppere es 0 ajacent o osite acin shingles; 'If it is desired th dt these shingleshall face in the same direction, this may be done by forming the slots12 the length of 4 the individual cutouts instead of twice this lengthas shown in Figure 5,'and cutting the sheet crosswise at one end of eachseries of slots as at H, there being no intermedlate cuts correspondinto 00 'of Figure 4, and the series of s ots being spaced closer togetherlengthwise of the sheet.

Figure 6 illustrates sheet material formed up with rectangular openings25 by correspondingly shaped and positioned um'etic-P ulated portions onthe cylinder mold. By cut-ting along the dotted lines as at \e-e andthen bending under the lower edges at the ends'of the cutouts, as shownin Figure 9, material having a double thick butt slotted through theupper thickness only may be (Figure 4) eachof half the widtlfiof withthe spaced ialpplymg a igures 8 and .11 areviews somewhat similar toFigures 6 and 9, but illustrate longer slots 28 and the material foldedsubstantially midway of the lengths of this slot to form double thickbutts slotted through boththicknesses as shown in Figure 11.

Having thus disclosed certain embodinrents of this'invention it shouldbe undermight be made thereln without departing from its spirit or scopeas defined by the appended claims.

I claim:

1. The method of maln'ng roofing which comprises forming a web offibrous sheet material having spaced openings therethrough, saturatlngthe web; and cutting the saturated web into roofing units in a definiterelation to said openings.

2. The method ofmaking roofing which comprises forming a web of fibroussheet material having spaced openings therethrough, saturatlng andcoating the web, and cutting the saturated and coatedweb into roofingunits in a definite relation to said openm 3. T e method of makingroofing which comprises forming a web 'of fibrous sheet material havingspaced openings therestood that various changes and modificationsthrough, saturating and coating the web,

e saturated, coated and surfaced web into roofing units in a definiteopenings.

surfacing thereto, and cutting relation to said 4. The method of makingroofing which comprises depositing'fibrous material in the form of afelted webhavin spaced openings therethrough, and cutting t e web soformed into roofing units in a definiterelation to said 0 enings'.

5. e comprises depositing fibrous materia in the form of a feltedwebhaving spaced series of parallel slots therein, web crosswise andlengthwise of'said slots to form roofing units each hayin'sgshin'gle'ots' simulating tabs separated by sald I 6. The -method of makingroofing which comprises depositin form of a felted we parallel slotstherein, treatin said web with waterproofing material, and cutting saidweb crosswise and lengthwise-of said slots to form roofing units eachhaving shingle sin'i ulatingltabs separated by said slots; 7. e methodof making roofin which comprlses depositing fibrous ma'teriafi in the 6fmaking *roo fin which and cutting said.

fibrous material in the having spaced series of form of a felted webhaving spaced series of parallel slots therein, treatin said web withwaterproofing material, app ying a surfacing to said treated web, andcutting said web crosswise and lengthwise of said slots to form roofingunits each having shingle simulating tabs separated by said slots.

8. The method of making roofing which comprises depositing fibrousmaterial in the form of a felted web having spaced openings 10therethrough, treating said web with waterproofing material, and cuttingsaid treated web into roofing units in definite relation to saidopenings; 7

In testimony whereof I have affixed my signature. v v o CHESTER E. RABBI

